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Abstract:

We solve the low-energy part of the spectrum of a model that describes a circularly polarized cavity mode strongly coupled to two exciton modes, each of which is coupled to a localized spin of arbitrary magnitude. In the regime in which the excitons and the cavity modes are strongly coupled, forming polaritons, the low-energy part of the spectrum can be described by an effective spin model, which contains a magnetic field, an axial anisotropy, and an Ising interaction between the localized spins. For detunings such that the low-energy states are dominated by nearly degenerate excitonic modes, the description of the low-energy states by a simple effective Hamiltonian ceases to be valid and the effective interaction tends to vanish. Finally, we discuss a possible application to two-qubit quantum computing operations in a system of transition-metal impurities embedded in quantum dots inside a micropillar. © 2011 IOP Publishing Ltd.

Registro:

Documento: Artículo
Título:Spin-spin indirect interaction at low-energy excitation in zero-dimensional cavities
Autor:Andrade, J.A.; Aligia, A.A.; Quinteiro, G.F.
Filiación:Centro Atómico Bariloche and Instituto Balseiro, Comisión Nacional de Energía Atómica, 8400 Bariloche, Argentina
Departamento de Física and IFIBA, FCEyN, Universidad de Buenos Aires, 1428, Buenos Aires, Argentina
Palabras clave:Axial anisotropy; Cavity mode; Circularly polarized; Detunings; Effective Hamiltonian; Effective interactions; Exciton modes; Indirect interactions; Localized spin; Low energies; Low-energy excitations; Low-energy state; Micro Pillars; Polaritons; Quantum Computing; Quantum Dot; Spin models; Spin-spin; Two-qubit; Zero-dimensional; Magnetic fields; Magnetic properties; Quantum computers; Quantum theory; Transition metals; Excitons
Año:2011
Volumen:23
Número:21
DOI: http://dx.doi.org/10.1088/0953-8984/23/21/215304
Título revista:Journal of Physics Condensed Matter
Título revista abreviado:J Phys Condens Matter
ISSN:09538984
CODEN:JCOME
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09538984_v23_n21_p_Andrade

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Citas:

---------- APA ----------
Andrade, J.A., Aligia, A.A. & Quinteiro, G.F. (2011) . Spin-spin indirect interaction at low-energy excitation in zero-dimensional cavities. Journal of Physics Condensed Matter, 23(21).
http://dx.doi.org/10.1088/0953-8984/23/21/215304
---------- CHICAGO ----------
Andrade, J.A., Aligia, A.A., Quinteiro, G.F. "Spin-spin indirect interaction at low-energy excitation in zero-dimensional cavities" . Journal of Physics Condensed Matter 23, no. 21 (2011).
http://dx.doi.org/10.1088/0953-8984/23/21/215304
---------- MLA ----------
Andrade, J.A., Aligia, A.A., Quinteiro, G.F. "Spin-spin indirect interaction at low-energy excitation in zero-dimensional cavities" . Journal of Physics Condensed Matter, vol. 23, no. 21, 2011.
http://dx.doi.org/10.1088/0953-8984/23/21/215304
---------- VANCOUVER ----------
Andrade, J.A., Aligia, A.A., Quinteiro, G.F. Spin-spin indirect interaction at low-energy excitation in zero-dimensional cavities. J Phys Condens Matter. 2011;23(21).
http://dx.doi.org/10.1088/0953-8984/23/21/215304